Reduce deep nesting of header files

Reduce the number of header files included from other header
files as much as possible without splitting the files. Use forward
declarations where possible. This allows removal of some unnecessary
"#ifndef __ASSEMBLY__" statements.

Also, review the .c and .S files for which header files really need
including and reorder the #include statements alphabetically.

Fixes ARM-software/tf-issues#31

Change-Id: Iec92fb976334c77453e010b60bcf56f3be72bd3e
diff --git a/services/spd/tspd/tspd_private.h b/services/spd/tspd/tspd_private.h
index 8b76876..81484e1 100644
--- a/services/spd/tspd/tspd_private.h
+++ b/services/spd/tspd/tspd_private.h
@@ -28,14 +28,13 @@
  * POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef __SPD_PRIVATE_H__
-#define __SPD_PRIVATE_H__
+#ifndef __TSPD_PRIVATE_H__
+#define __TSPD_PRIVATE_H__
 
-#include <context.h>
 #include <arch.h>
+#include <context.h>
+#include <platform.h>
 #include <psci.h>
-#include <tsp.h>
-#include <cassert.h>
 
 /*******************************************************************************
  * Secure Payload PM state information e.g. SP is suspended, uninitialised etc
@@ -91,6 +90,9 @@
 
 #ifndef __ASSEMBLY__
 
+#include <cassert.h>
+#include <stdint.h>
+
 /* AArch64 callee saved general purpose register context structure. */
 DEFINE_REG_STRUCT(c_rt_regs, TSPD_C_RT_CTX_ENTRIES);
 
@@ -121,6 +123,11 @@
 extern const spd_pm_ops_t tspd_pm;
 
 /*******************************************************************************
+ * Forward declarations
+ ******************************************************************************/
+struct entry_info;
+
+/*******************************************************************************
  * Function & Data prototypes
  ******************************************************************************/
 extern uint64_t tspd_enter_sp(uint64_t *c_rt_ctx);
@@ -132,7 +139,7 @@
 					uint64_t mpidr,
 					tsp_context_t *tsp_ctx);
 extern tsp_context_t tspd_sp_context[TSPD_CORE_COUNT];
-extern entry_info_t *tsp_entry_info;
+extern struct entry_info *tsp_entry_info;
 #endif /*__ASSEMBLY__*/
 
-#endif /* __SPD_PRIVATE_H__ */
+#endif /* __TSPD_PRIVATE_H__ */